Something like this?SELECT
s.staff_id,
s.first_name + ' ' + s.last_name AS staff_name,
COUNT(DISTINCT a.assignment_id) AS Assignments
FROM
staff s
LEFT JOIN assignments a ON
a.staff_id = s.staff_id
GROUP BY
s.staff_id,
s.first_name + ' ' + s.last_name
ORDER BY
Assignments;